Bootstrap: A Responsive Framework

Wouldn't it be nice if we could avoid the specifics of all of those grid layout percentage widths and media queries and concentrate on higher level layout considerations? If typography, buttons, forms, and other UI elements started from some good-looking CSS styles but were easy to modify? With the advent of responsive design has come the welcome arrival of frameworks - self-consistent HTML/CSS/JavaScript systems for quickly and easily building responsive sites.

Originally built by Twitter and open-sourced in 2011, Bootstrap is downloadable for free, either from the http://getbootstrap.com/ website or from the Bootstrap GitHub page. Bootstrap takes away a fair amount of the low-level implementation details when building a responsive site: flexible grids, media queries, flexible images, and other familiar aspects of responsive sites are baked in. You can (and will) exert fine-level control over CSS, JavaScript, and other aspects of sites you build with Bootstrap.